Event: D Division

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Opponent	Rating	Result
John C Skipworth	1579	1 - 0
Conor Hicks	1523	0 - 1
Richard A Gavin	1815	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1506 = (4917 + 400 * (1 - 2)) / 3)